ISO-8434-3-2005.pdf
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1、 Reference number ISO 8434-3:2005(E) ISO 2005 INTERNATIONAL STANDARD ISO 8434-3 Second edition 2005-07-15 Metallic tube connections for fluid power and general use Part 3: O-ring face seal connectors Raccordements de tubes mtalliques pour transmissions hydrauliques et pneumatiques et applications gn
2、rales Partie 3: Connecteurs joints faciaux toriques ISO 8434-3:2005(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and insta
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5、lease inform the Central Secretariat at the address given below. ISO 2005 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writ
6、ing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2005 All rights reserved ISO 8434-
7、3:2005(E) ISO 2005 All rights reserved iii Contents Page Foreword. v Introduction. vi 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Materials 3 4.1 General. 3 4.2 Connector bodies . 3 4.3 Nuts 3 4.4 O-rings . 4 5 Pressure/temperature requirements. 4 6 Designation of connectors 5
8、 7 Requirements for tubes 7 8 Across-flats dimensions and tolerances 8 9 Design 8 9.1 Connectors 8 9.2 Dimensions 8 9.3 Passage tolerances 8 9.4 Angular tolerances . 8 9.5 Contour details 8 9.6 Stud ends. 8 9.7 Reducing connectors. 8 10 Screw threads . 8 10.1 O-ring face seal ends 8 10.2 Stud ends (
9、connection ends) 9 11 Manufacture. 9 11.1 Construction 9 11.2 Workmanship 9 11.3 Finish 9 11.4 Connector protection . 9 11.5 Corners 9 12 Assembly instruction . 10 13 Procurement information. 10 14 Marking of components . 10 15 Performance and qualification test. 10 15.1 Performance requirements 10
10、15.2 Test data form. 12 16 Identification statement (reference to this part of ISO 8434) . 12 Annex A (normative) Specification for 1-14 UNS inch screw threads Basic dimensions 45 Annex B (normative) Reduction factors for reducing connectors 46 Annex C (normative) Formed tube connection for ISO 8434
11、-3 O-ring face seal connectors. 56 ISO 8434-3:2005(E) iv ISO 2005 All rights reserved Annex D (informative) O-ring face seal tube and hose connections with metric or inch tubing or swivel hose connector58 Annex E (informative) Typical connections with O-ring face seal connectors59 Annex F (informati
12、ve) Assembly instructions for adjustable connectors in ISO 6149-1 ports62 ISO 8434-3:2005(E) ISO 2005 All rights reserved v Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Internationa
13、l Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO,
14、also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical commi
15、ttees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the po
16、ssibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 8434-3 was prepared by Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 4, Connectors and similar product
17、s and components. This second edition cancels and replaces the first edition (ISO 8434-3:1995), which has been technically revised. ISO 8434 consists of the following parts, under the general title Metallic tube connections for fluid power and general use: Part 1: 24 cone connectors Part 2: 37 flare
18、d fittings Part 3: O-ring face seal connectors Part 4: 24 cone connectors with O-ring weld-on nipples 1) Part 5: Test methods for threaded hydraulic fluid power connections 2) Part 6: 60 cone connectors with or without O-ring 1) ISO 8434-4 will be incorporated into the revision of ISO 8434-1. 2) ISO
19、 8434-5 will be withdrawn once ISO 19879 is published. ISO 8434-3:2005(E) vi ISO 2005 All rights reserved Introduction In fluid power systems, power is transmitted and controlled through a fluid (liquid or gas) under pressure within an enclosed circuit. In general applications, a fluid may be convey
20、ed under pressure. Components may be connected through their ports by connections (connectors) and conductors (tubes and hoses). Tubes are rigid conductors; hoses are flexible conductors. This part of ISO 8434 is based on the USA standard ANSI/SAE J1453. The threads for the O-ring face seal connecti
21、on are unified inch threads to ISO 263. The inch threads were not changed to metric threads to ISO 261 to allow connectors complying with this standard to be used in existing applications without requiring a change to tube or hose assemblies. Also, the thread-to-nut overtorque and seal performance h
22、ave been extensively tested; to change to metric threads would require an extensive test program at considerable cost without providing any functional improvement. The threads are integral to themselves, connectors of this type match only to themselves, and other than having metric threads, no value
23、 in changing could be found. Major international companies that have used these connectors have adopted the design without noting any problems. All wrench flats are dimensioned to be used with ISO standard metric wrenches. INTERNATIONAL STANDARD ISO 8434-3:2005(E) ISO 2005 All rights reserved 1 Meta
24、llic tube connections for fluid power and general use Part 3: O-ring face seal connectors 1 Scope This part of ISO 8434 specifies the general and dimensional requirements for the design and performance of O-ring face seal connectors made of steel for tube outside diameters or hose inside diameters o
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